Working on guns is like working on any mechanical system. Lots of swearing till you get the hang of it and then, meditation. Knowing the basic do's and don'ts when working with tools shortens the learning curve. It's especially a blast when you see/feel the effect of that latest mod you worked on, once you hit the range. Kinda like hitting the track with that perfectly dialed in suspension. Reloading ammo is similar. Basically you gotta be ANAL about all the measurements, but once you get going and see how each load you work on performs at the range, it's an eye-opening experience. Your best bet is to start shooting, using factory ammo and learn how to do things as you go along.
Word to the wise: Always work in a small room with a clean uncluttered floor or you'll be spending half your life looking for tiny springs and pins